tdd(authguard): add tests

fixes: $129

internal/middleware/auth_guard_test.go

@@ -0,0 +1,88 @@
+package middleware
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/Everything-Explained/go-server/internal/db"
+	"github.com/Everything-Explained/go-server/internal/router"
+	"github.com/Everything-Explained/go-server/testutils"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAuthGuard(t *testing.T) {
+	t.Parallel()
+	a := assert.New(t)
+	rq := require.New(t)
+
+	tmpDir := t.TempDir()
+
+	u, err := db.NewUsers(tmpDir)
+	rq.NoError(err, "should initialize new users")
+
+	defer u.Close()
+	u.Add(false)
+	userID, err := u.GetRandomUserId()
+	rq.NoError(err, "should get random user id")
+
+	r := router.NewRouter()
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(200)
+	}, AuthGuard(u))
+
+	t.Run("halts req chain on bad authorization header", func(*testing.T) {
+		req := testutils.MockRequest(
+			r.Handler,
+			"GET",
+			"/",
+			nil,
+			nil, // test no header
+		)
+
+		a.Equal(http.StatusUnauthorized, req.Code, "should return unauthorized status")
+		a.Equal("Malformed Authorization\n", req.Body.String(), "should return reason")
+
+		req = testutils.MockRequest(
+			r.Handler,
+			"GET",
+			"/",
+			nil,
+			&map[string][]string{
+				"Authorization": {"Bearer "}, // test invalid header
+			},
+		)
+
+		a.Equal(http.StatusUnauthorized, req.Code, "should return unauthorized status")
+		a.Equal("Malformed Authorization\n", req.Body.String(), "should return reason")
+	})
+
+	t.Run("halts req chain on unauthorized users", func(*testing.T) {
+		req := testutils.MockRequest(
+			r.Handler,
+			"GET",
+			"/",
+			nil,
+			&map[string][]string{
+				"Authorization": {"Bearer testuser"},
+			},
+		)
+
+		a.Equal(http.StatusForbidden, req.Code, "should return forbidden status")
+		a.Equal("Bad User\n", req.Body.String(), "should return reason")
+	})
+
+	t.Run("resumes req chain on valid users", func(*testing.T) {
+		req := testutils.MockRequest(
+			r.Handler,
+			"GET",
+			"/",
+			nil,
+			&map[string][]string{
+				"Authorization": {"Bearer " + userID},
+			},
+		)
+
+		a.Equal(http.StatusOK, req.Code, "should return okay status")
+	})
+}